rmap: simplify try_to_unmap_file()

Just simplify the code when `mlocked' is true.
Signed-off-by: NHuang Shijie <shijie8@gmail.com>
Reviewed-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/rmap.c

@@ -1103,13 +1103,10 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
 		if (ret == SWAP_MLOCK) {
 			mlocked = try_to_mlock_page(page, vma);
 			if (mlocked)
-				break;  /* stop if actually mlocked page */
+				goto out;  /* stop if actually mlocked page */
 		}
 	}
 
-	if (mlocked)
-		goto out;
-
 	if (list_empty(&mapping->i_mmap_nonlinear))
 		goto out;